I have one but don't know where I got it from but I wanna keep it cause it has a 2% exp boost wihich i would not mind having (every little bit helps ) but yes anyone one where its at? I can't find it on wiki

oh so I bought it lol figures. I guessin weapons you buy you can't enhance lol

You can, just need to either pray with the Lucky Boxes you find have the Treasure Sword or hope Miroku has the weapon again if you want to smelt them.

Whats it look like?

it drops in Okuizumo, the dungeon in izumo that you go to after defeating benkei. Can get it from both Gold and Silver identifications.